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  • Telemedicine  (1)
  • Video conference technology  (1)
  • pericardium  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Open chest and open pericardium affect the distribution of myocardial blood flow in the right ventricle (1990)
    Springer
    Basic research in cardiology 85 (1990), S. 508-518 
    Details
    ISSN: 1435-1803
    Keywords: myocardialblood flow ; rightventricle ; pericardium ; microspheres ; dog
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We have investigated the effects of open chest and open pericardium on the distribution of myocardial blood flow assessed with the radioactive microsphere technique (15 μm). Five dogs with intact thorax served as controls (group I) and six dogs were studied after a right-sided thoracotomy and pericardiotomy (group II). Global myocardial blood flow (mean±S.D.) was 0.73±0.17 ml·min−1·g−1 in group I and 1.22±0.09 ml·min−1·g−1 in group II (p〈0.05). Analysis of transmural blood flow distribution revealed that flow was 44% higher in the right and 60% higher in the left ventricular endocardial layers in the open-chest animals, whereas epicardial flow increased by 105% and 90%, respectively. As a result of the preferential blood flow to the epicardial layers of the right ventricle, the endo/epi ratio was reduced from 1.30±0.26 in group I to 0.86±0.11 in the open-chest group (p〈0.05). Left ventricular endo/epi ratio was 1.27±0.16 and 1.06±0.11 (n.s.), respectively. External work and diastolic filling pressure of the right ventricle did not differ between the two groups and therefore cannot account for the redistribution of myocardial blood flow. It is concluded that the distribution of myocardial blood flow, particularly in the RV, is severely disturbed by thoracotomy and pericardiotomy. This is an important aspect for the planning and evaluation of studies under open-chest/open-pericardium conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01931496
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Diagnostic accuracy in remote expert consultation using standard video-conference technology (1996)
    Springer
    European radiology 6 (1996), S. 932-938 
    Details
    ISSN: 1432-1084
    Keywords: Teleradiology ; Telemedicine ; Video conference technology ; Remote expert consultation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract An international multicenter study (Germany Sweden, and Switzerland) was performed to investigate the feasibility and diagnostic of standard video-conferencing (VC) technology for remote expert consultation in radiology. Three high spatial resolution films (hand-bone, mammography, chest) and two low-spatial-resolution image sets (liver CT and MR1) were studied (total 446 images taken from different examinations). The images were recordedby a video camera transmitted via public broadband networks, and displayed on a video monitor. The resolution of the recorded images varied from 24 lp mm to 4.8 lp/mm at maximum zoom. Alter 3–4 months, the images were reexamined using conventional light-box reading. Diagnostic reliability was evaluated by receiver operating characteristics (ROC) analysis. With video conferencing, there was a noticeable loss of diagnostic accuracy for the high-spatial-resolution films, whereas for liver CT and liver MRIimages VC reading seemed to be satisfactory (average area value difference 〈 0.02)
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00240711
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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